src/pkg/runtime/memclr_386.s - Issue 160200044: [dev.power64] code review 160200044: build: merge default into dev.power64

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Delta Between Two Patch Sets: src/pkg/runtime/memclr_386.s

Issue 160200044: [dev.power64] code review 160200044: build: merge default into dev.power64 (Closed)

Left Patch Set: Created 10 years, 4 months ago

Right Patch Set: diff -r be0c14f62257b42485019e9e1db23cf40d2e249f https://code.google.com/p/go Created 10 years, 4 months ago

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1 // Copyright 2014 The Go Authors. All rights reserved.	1 // Copyright 2014 The Go Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style	2 // Use of this source code is governed by a BSD-style

3 // license that can be found in the LICENSE file.	3 // license that can be found in the LICENSE file.

4	4

5 // +build !plan9	5 // +build !plan9

6	6

7 #include "../../cmd/ld/textflag.h"	7 #include "textflag.h"

8	8

9 // void runtime·memclr(void*, uintptr)	9 // void runtime·memclr(void*, uintptr)

10 TEXT runtime·memclr(SB), NOSPLIT, $0-8	10 TEXT runtime·memclr(SB), NOSPLIT, $0-8

11 MOVL ptr+0(FP), DI	11 MOVL ptr+0(FP), DI

12 MOVL n+4(FP), BX	12 MOVL n+4(FP), BX

13 XORL AX, AX	13 XORL AX, AX

14	14

15 // MOVOU seems always faster than REP STOSL.	15 // MOVOU seems always faster than REP STOSL.

16 clr_tail:	16 clr_tail:

17 TESTL BX, BX	17 TESTL BX, BX

(...skipping 101 matching lines...) Expand 10 before \| Expand all \| Expand 10 after Loading...
119 MOVOU X0, -16(DI)(BX*1)	119 MOVOU X0, -16(DI)(BX*1)

120 RET	120 RET

121 nosse2:	121 nosse2:

122 MOVL BX, CX	122 MOVL BX, CX

123 SHRL $2, CX	123 SHRL $2, CX

124 REP	124 REP

125 STOSL	125 STOSL

126 ANDL $3, BX	126 ANDL $3, BX

127 JNE clr_tail	127 JNE clr_tail

128 RET	128 RET

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